本书是网络原理和工程实践的绝佳教科书，不仅适用于教师备课和课程实践的安排，而且有利于网络工程人员自学。该书涉及网络方方面面，包括标准，协议，设备，软件配置，安全和系统集成等，能使你在短时间内从外门汉成为令人羡慕的网络高手。根据学习特点进行内容编排也是本书一大特色，本书提供现实生活中的实例，并配有大量实践练习，不仅能让你在短时间内轻松掌握网络基本原理，而且能在学习基本原理的同时及时进行网络实践，使你成为名副其实的“理论家”和“实践家”。-This book is the principle of network and engineering practice of textbooks, not only applicable to the teachers　preparation and course arrangement, and the practice of network engineering personnel self-study. It involves many aspects, including the network protocol, equipment, standard, software configuration, safety and system integration, etc, can make you in a short time the door from han become enviably network. According to the characteristics of content arrangement, the book is book features provide real-life examples, and equipped with a lot of practice exercises, not only can allow you to easily in a short time, and basic principle of network in learning the basic principles and practice in network, that you may become a real "theorists" and "practitioners.